A sample of 16 smokers is obtained.

| March 14, 2016

Question
A sample of 16 smokers is obtained. Hald of the smokers (n=8) view a video and the other half (n=8) serves as a control group. The number of packs of cigaretters each person smoked during the following week is recorded. The data are as follows:

Controls: M=17.5, SS = 122

Video Viewers: M = 8.1, SS = 102

a) Use the sample data to make a point estimate of the mean difference in smoking behavior between the control group and the video viewers.

b) Use the sample data to make an interval estimate of the mean difference so that you are 80% confident that the population mean is in your interval.

c) what is the critical t?

d) What is the lower bound?

e) what is the upper bound?

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